Flexible, Low Loss Coaxial Cable Assemblies

HSI offers a comprehensive choice of flexible, low-loss, coaxial cable assemblies which exceed the performance of everyday, standard flexible coaxial cable solutions. Our flexible coaxial cable assemblies meet MIL-C-17/LMR specifications and are constructed with solid, foamed and proprietary low-dielectric constant membranes, and precise closed-loop-control manufacturing processes. HSI’s flexible coaxial cable technology is agnostic and can be engineered for a wide variety of applications ranging from wireless broadband, test systems, ground based satellites, antennas, electronic warfare, defense, automotive, robotic, medical, telecommunication, microwave, etc.

HSI's range of 0.047, 0.086 and 0.141 inch cable solutions can be terminated to a wide range of coaxial connectors, including 1.85 mm, 2.4 mm, 2.92 mm, 3.5 mm, SMA, TNC, Type N, and other high performance connectors. These high-performance, flexible cables feature silver-plated copper-clad center conductors, achieving static bend radius as small as 0.25 in., and boasting up to 90+% velocity of propagations (VPs).


  • Flexible equivalent to semi-rigid cables and conformable cables
  • Phase stable to 70 GHz
  • Solid, foamed and ePTFE dialectrics
  • Range of 0.047 to 0.141 flexible cable solutions, terminating to a wide range of high-performance connectors

connector options

1.0 mm, 2.4 mm, 2.9 mm, 3.5 mm

Direct to board fine wire attachment to .175 mm
also available.
Performance Ranges
Frequency Insertion Loss Velocity of Propagation
DC - 70 GHz < 1 dB @ 40 GHz Up to 90%
Phase Stability

Delay & Phase Matching

Power Capability
< 5° through 40 GHz
(flexure & temperature)

≤ ± 1° per GHz
(≤ ± 3 ps delay matching)

1000 CW @ 5 GHz
Cable Configurations
Coax (16 AWG - 52 AWG)

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Download the Specs on Our Latest Flexible Cable

VP90 flexible cable datasheet

VP90 Video

PTFE VP90 coax cable assembliesHSI's coaxial cables are processed using solid, foamed, and expanded PTFE (VP90) dielectrics — offering high performance coax cable assemblies up to 70 GHz and down to 0.175 mm in pitch. Watch now.